Removed incorrectly exposed webidl interfaces

I removed exposure in Window and Worker to some interfaces that
was not specified in the specification.

components/script/dom/webidls/HTMLModElement.webidl

@@ -3,7 +3,6 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlmodelement
-[Exposed=(Window,Worker)]
 interface HTMLModElement : HTMLElement {
   //         attribute DOMString cite;
   //         attribute DOMString dateTime;